Tie plate



Nov. 18, 192 4.

J. LUNDIE TIE PLATE Filed Nov. 5. 1923 w g INV ENTOR BY /7 Jo 7272Patented Nov. 18, 1924.

JOHN LUNIDIE, OF NEW YORK, N. Y.

TIE PLATE.

Application filed November 5, 1923. Serial No. 672,895.

To all whom it may concern:

Be it known that I, JOHN LUNDIE, a citizen of the United States,residing at New York, in the borou h of Manhattan, county and State ofNew Stork, have invented certain new and useful Improvements in TiePlates, of which the following is a specification.

This invention relates to improvements in tie-plates generally and is aspecific improvement over the tie-plate of my Reissue Letters Patent No.14,12d, dated May 2, 1916, although capable of a broader application.

One of the objects of the present invention is to provide the bottom ofa tie-plate with depressions indented therein, the depressions being soplaced in the bottom of the plate that in view of large surroundingareas or portions of said bottom, the said depressions, which areslight, may act with a suction effect on a tie both before and after theplate is fully seated on the tie. This object is probably more fullygained in places where the wooden ties are constantly kept moist, as,for instance, in tunnels, or in other places where the ties are moist,although this suction effect is gained in connection with wooden tiesgenerally.

Other objects of the invention are to provide tie-plates withdepressions indented in the bottom surfaces thereof, which will assistvery materially in the rolling of the plates, inasmuch as theprotuberances on the rolls corresponding to the depressions would gripthe bar as it passes through the rolls; to provides tie-plates withindented depressions which will not impair the strength of any plate butwould reduce its weight somewhat; and, by reason of the indenteddepressions, to tend to prevent slippage of the plate not only crosswiseof rail but at right angles to it.

The improved tie-plate in its preliminary seating, especially adaptsitself to creosoted ties, owing to the suction action which it wouldhave on such ties.

These being among the objects of the present invention, the sameconsists of certain features of construction and combinations of partsto be hereinafter described and then claimed with reference to theaccompanying drawings illustrating desirable embodiments of theinvention and in which- Fig. 1 is an under-side plan of the invention asapplied to what is known as the Lundie type of tie-plate;

Fig. 2 is a longitudinal section thereof;

Fig. 3 is an end elevation of the same, the toe end of the plate beingslightly raised out of the normal seatingv position of the plate so asto more fully disclose the relation of the indented depressions to theunder-surface of the plate;

Fig. 1- is a longitudinal section of a true flat tie-plate or aflat-bottomed tie-plate.

Referring to Figs. 1, 2 and 8 of the drawings, the tie-plate 10 is shownas of the Lundie type. It is provided with a railretaining shoulder 11and an inclined top 12 on which the rail rests so that it would beinclined. Preferably the inclination corresponds to the coning of thestandard coned tread car wheel. Preferably the plate is truly camberedas indicated at 13, through out the width of the plate, that is parallelto the rail-retaining or abutting shoulder 11. The under-side of theplate is provided with preferably flat parallel surfaces 14 which extendparallel with the rail-abutting shoulder 11 and which are parallel withthe convex top surface 12 of the'plate. These flats or fiat surfaces 14are stepped, as it were, so as to develop or form ribs 15 which extendtransversely of the plate in the same direction as the shoulder 11.

As applied to the Lundie type of tieplate the present invention residesin cuplike depressions 16 which are indented into the concav-ed bottomsurface of the plate. The number of the depressions in the series may.of course, be varied, and preferably they are arranged in staggeredrelation to each other so that certain lines thereof extend diagonallyof theplate. However the number of the depressions or the arrangementmay be, each depression is preferably of circular form or approximatelyso and is small relatively to the surrounding tie-bearing area of thebottom of the plate. As applied to the plate shown it will be seen thatthe depressions 16 extend in rows transversely of the plate, there beingone row preferably for each flat or transverse flat surface 14.

Preferably the edge of each depression is rounded off so as not to tendto injure the tie. It will be seen that a tie-plate pro- .vided withrelatively small cup-shaped depressions in its bottom surface will tendto adhere to the tie by suction. The relatively large bearing surfacesand the shallow depressions indented in the bottom of the tieplatedefine the profile of the bottom of the plate, and when the plate isbeing seated on the tie and after it has been fully seated thereupon itwill have produced a reverse counterpart on the top surface of the tiein such way that the plate will be seated on the tie and will besubjected to use which will not tend to injure the fibres of the wood ordamage the tie. At the same time the pertions of the tie, which aremolded, as it were, into the depressions, and the depressionsthemselves, tend to prevent slippage of the plate not only crosswise ofthe rail but at right angles to it. This action would lend itselfacceptably to a tie-plate of the Lundie type.

However, the invention is not restricted to the type of tie-plate shownin Figs. 1, 2 and 3, inasmuch as the more or less scattered depressionsmay be indented into the bottom surface of a truly flat plate or intothe bottom of a fiat-bottomed tie-plate as indicated at 17 in Fig. 4.This and other modifications of the invention may be resorted to withoutdeparting from the spirit and scope thereof as defined in the claims.

I am aware that in the prior art it is old to provide depressions, whichare more or less small in area, upon the bottoms of tieplates, and whichare located below the bottom surfaces thereof that is to say eachdepression, if such it may be called, is bounded by a tie-entering ribor flange; but so far as I am aware I am the first to suggest the ideaof providing in, not on, the

bottom surface of a tie-plate a series of shallow depressions, each ofwhich is bounded by a relatively large tie-bearing area of such bottomsurface.

What I claim as new is l. A tie-plate having a concave-curved lower facefor bearing upon a tie, and the concaved face having a series ofscattered shallow depressions.

2. A truly-cambered tie-plate having a series of scattered shallowdepressions in its eoncaved facev 3. A tie-plate, the lower face ofwhich is indented with a series of shallow depressions, each of whichdepressions is surrounded by tie-bearing area of the lower face, whicharea is larger than that of the depression surrounds.

l. A tie-plate, the lower face of which is indented with a series ofshallow depressions, each having a circular-like area which isrelatively small compared with adjacent tie-bearing portions of thelower face.

A tie-plate the lower face of' which is ribbed, and is indented with aseries of shallow depressions, each of which is surrounded by atie-bearing area of the lower face, which area is larger than that ofthe depression it surrounds.

6. A tie-plate having an upper rail seat normal to the line of thrust ofthe standdard coned tread car-wheel, and lower stepped surfacesparallelwith said seat, the stepped surfaces having shallow depressions.

7. A tie-plate having an upper rail seat normal to the line of thrust ofthe standard coned tread car-wheel, and lower stepped surfaces parallelwith said seat, the stepped surfaces having rows of shallow depressionsextending longitudinally thereof.

JOHN humans.

